P2600: Coolant pump A control circuit open
What the code tells you on its own
- System
- Powertrain
- Functional group
- Not yet classified
- Subsystem
- Computer output circuit and ECU
Engine, fuel, air, ignition, emissions and transmission. The overwhelming majority of what workshops bring to the AI.
Diagnostics
What we see when P2600 turns up
Measured across the diagnostics run through Wrenchlane, not taken from a reference table. Figures as of 2026-10-06.
- Diagnostics
- 3
- Separate workshops
- 3
- Arrived code only
- 33%
- Most common marque
- Mercedes-Benz
June 2026 to September 2026
Not one shop meeting it repeatedly
No symptom description entered at all
Where we have seen it most
These are counts from our own work, not a claim about how common the fault is across all vehicles. They describe what independent workshops brought to us, which is a narrower and more specific thing.
Real cases
Real cases with P2600
Diagnoses of P2600 on real cars, written up: the car, the codes it came in with, the causes ranked and what to check first.
Not yet classified
Other not yet classified codes
- P00AF Turbocharger boost control module performance
- P2237 O2 sensor positive current control circuit open, bank 1 sensor 1
- P208E Not individually documented
- P2269 Water in fuel condition
- P0215 Engine shutoff solenoid
- P2299 Brake pedal and accelerator pedal position incompatible
- P0661 Intake manifold tuning valve control circuit low, bank 1
- P2426 Exhaust gas recirculation cooling valve control circuit low
FAQ
Frequently asked questions
How do I run a diagnosis?
Select the vehicle on Start, click the Diagnostic card and choose New diagnostic. Fill in the description, the error codes and the mileage, then click Analyze.
Do I have to type the codes from my scan tool?
No. Click the camera button next to Error codes and take or choose a photo of the scan tool's screen; WrenchLane reads the codes and their descriptions into the form. You can also speak them with the microphone.
Are the public fault code pages built from my diagnostics?
They use diagnostics run in WrenchLane, with no workshop, customer, registration number or VIN shown. Each fault code page shows how often the code was seen and in how many workshops.
Run P2600 against the car in front of you
Enter the code and the symptoms and get ranked probable causes for that specific vehicle, with the checks in the order worth doing them. Free account, no card.